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Fleetwood 1052C
TuningRange PowerSurpplyBatteries M ai n s B a t t e r yC o n s u m p t i o n
TO REMOVE CHASSIS FROM CASE. Remove the power cord from the mains outlet and the receiver. Close the shutter, open the rear cover of the case (the fastening screwsare captive and the.holes in the cover are slotted) and remove the battery pack. Unsolder the two cilnnections from the chassis to the a e r i a l l o o p o n t h e t u n i n g c o n t r o l s i d e . D i s e n g a g et h e on/o{f switch actuating arm from the shutter. Lay the receiver face downwards on some protective material and from outside the case remove the two top securing screws. Remove the two securing screws and nut plates at the bottom of the chassis. The chassis may now be lifted from the case, but in doing so the power transformer end should be cleared first. Refitting the chassis to the case is a reversalof the removal procedure. Care should be taken to see that tlre on/off switch actuating arm is engaged with the s h u t t e r b e f o r e a n y m o u n t i n g s c r e w sa r e p u t i n t o p o s i t i o n . The top mounting holes are slotted to allow the chassis to be adjusted to bring the control rollers into correct fitting in the dial cut-out. The screwsat the bottom o f t h e c h a s s i ss h o u l d b e t i g h t e n e d l a s t .

530-1620 kcls. Types 153, 3153or 5153 pack;A, 9Y; B,90V. 200-250V40-50 c/s. 14 mA.
ALIGNMENT. Alignment should be carried out with the receiver o p e r a t i n g f r o m t h e b a t t e r y p a c k . T h e c h a s s i ss h o u l d b e removed f rom the case and the bottom cover shield should be rn position. The adjusting screws of the located at the tops of the cans. the order:I. 2. 3. 4. | . F . t r a n s fo r m e r s a r e They are adjusted in

S e c o n d a r y2 n d l . F . T . ( s c r e w n e a r e r I 5 5 ) . Primary2nd LF.T. (screw nearer lT4). S e c o n d a r yl s t l . F . T . ( s c r e w n e a r e r l T 4 ) . P r i m a r y l s t l . F . T . ( s c r e wn e a r e r l R 5 ) .

MAINS VOLTAGE ADJUSTMENT.
The power transformer is provided with thre'eprimary winding tappings--z}O/2lO volts, 230/240 volrs and 250 v6115-fsr iire adlustment of ihe receiver to the supplyvoltageat the point of installation. The receiver is adjusted at the factory to the 230/ 240 volts tapping. DIAL CALIBRATION ADJUSTMENT. l f d i a l c a l i b r a t i o n sa r e i n c o r r e c t b v a n e q u a l a m o u n t of error over the band, the condition may be corrected by moving the cursor on the dial driving cord. This may be done through a speciallyprovided slot in the rear of the dial assembly.

F o r R . F . a l i g n m e n tu s e t h e l . F . d u m m y . T h e t r i m m e r layout is shown as an inset to the circuit diagram. Bef o r e c o m m e n c i n ga l i g n m e n t , s e t t h e d i a l c u r s o r , w i t h t h e tuning gang fully closed,to the right-hand edge of the s t a t e d e s i g n a t i o nn u m e r a l s . A l i g n m e n t f r e q u e n c i e sa r e : 6 0 0 k c l s n Z L l , a d i u s t o s c i l l a t o rc o i l c o r e ; a n d 1 , 4 2 4 k c l s ( 3 X Y ) , a d i u s t o s c i l l a t o ra n d R . F . c a p a c i t i v et r i m mers. Signal generatorshould be applied between Vl signalgrid and chassis. No attempt should be made to adjust the core of the R.F. coil. T h e l o o p s h o u l d b e a d i u s t e d w i t h t h e c h a s s i sf i t t e d t o the case,the battery pack irr position and the rear cover closed. The signalgenerator (1,42O kcls) should be a p p l i e dt h r o u g h t h e l . F . d u m m y i n s e r i e sw i t h a 5 0 0 o h m s r e s i s t o r ,t o t h e l u g s t r i p i n t h e l e f t - h a n d 6 3 5 9 s 6 l - 1 1 - 1 9 l u g n e a r t h e r e a r c o v e r i s a e r i a l . F o r t h e p u r p o s e so f by conbet i r c ' n e ctten g o n t r o l t h e r e c e i v e r c a n b e d e s e n s i t i s e d a 5,000 ohms carbon resistor and a 0.1 mF c a p a c i t o r i n s e r i e sb e t w e e n V 2 s i g n a l g r i d a n d c h a s s i s .

D I A LC O R DL A Y O U T

CURSOR ASSY.

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Fleetwood 1052C
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Fleetwood 1052C
CAPACITOR,S
No. Rl, I0, 12 RZ,3, 1 R4 R5 R 6 ,1 9 R8
R9 , l 8 RI I Rl5,21 Rl6, 17 R2 0 R22 R23 R24 Des c ri p ti o n 0.47 megohms ]'W carbon 100,000 ohms 'l'W carbon 47,000 ohms {'W carbon 82,000 ohms l'W carbon l0o/o 2.2 megohms{'W carbon I megohm carbon potentiometer, reverse t ape r 3. 3 me g o h msl ' W c a rb o n l0 megohms ')'W carbon 2,200 ohms lW carbon 1,300ohms 5W W/W 5o/o o Z 2O , O O O h ms ' ]W c a rb o n 1,000 ohms l'W carbon 470 ohms 'l'W carbon fro S electe d m I w a tt ra ti n g s of 4 1 ,0 0 0 , 3 3 ,0 0 0 a n d 22,000 ohms to correct f i l a m e n tv o l t a g e ( r e f e r v olt a g e a n a l Y s i s )

RESISTORS
No.

cotLs
No. Ll Ohms l . l - 1. 5 Description Aerial loop
Aerial loop R.F. coil (l red and I b l u e s p o t s) LF. transformer ( s t e p - u p) Oscillator coil (l blue spot) | .F . t r a n s f o r m e r ( s t e p - d o w n) Output transform Speaker

c!,2,3 c4 c5 c6

DescriPtion Tuni ng caP aci tor 50 pF comP r.tri m

5oo pF -i..

Lz
L3

0.1 mF 200V P aP

c1 , 26,21 , 0.05 mF 200V P aP 3l 30 pF air trimmer c8,ll P art of I st l .F. trans c9,l0

r.l-r.5 <0.5
9 . 5 - t2 . 5 2.1-2.9 i l . 5 -1 5 . 5 r 2 . 5 -1 6 . 5 2.5-3.5 0 . 8 -l . 2

L4 L5 L6 L1 L8 L9

20 pF mi ca 525 pF mica 2o/o 0.001 mF mica cl4 P art of 2nd l .F. trans cl5, l6 100 pF mica c l 1, 2 4 c l 8 , 1 9 , 2 0 0.01 mF 600V P aP er 0.02 mF 400V P aP er c2l 24 mF 350V el ectro c22 100 mF lOV electro C 2 3 ,Z B 20 mF l OV el ectro c25 50 mF 200V el ectro c29 0.001 mF 600V PaP c30

ctz ci3

Ll 0 1 2 . 5 - 1 6 . 5 'r r . 5 -r 5 . 5 Ln Lr2 Lr3 4t0-550 <0.5

L i4

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All tolerances are 20o/o unless otherwise i s P e c i fe d .

L l5 r 5 O - 2 O O J L r 6 3 8 0 - 5 2 0 Power Ll7 < 0 . 5J

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REPLACEMENT OF VOLUME CONTROL ROLLER A OF R E P L A C E M E N T T U N I N GS P I N D L E N D / O R AND/OR POTENTIOMETCR AND/OR MOULDING. AND/OR DIAL SUPPORT ROLLER It is necessaryto remove the dial assembly-from the tripod supporting bracket for this operation. To remove the tuning spinJle remove the retaining clip and withdraw the ipindle. The rotler may now be removed. At this stage the dial support moulding may be readily removed. SUPPORT MOULDING. These operaticns may be performed without the need to remove the dial assembly. Remove the retaining clip and spring for the on/off switch actuating arm and remove the on/off switches. Unscrew the potentiometer mounting plate and withdraw the plate, potentiometer and roller. The roller is a friction fit on the spindle and may be removed with a firm pull. The left-hand dial support moulding may now be removed by unscrewing.

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AERIALAND EARTH.

F o r i m p r o v e d s i g n a l p i c k - u p i n d i ff i c u l t a r e a s a n external aerial olrci earth may be used. Pin contacts are provided in the left-hand case end for making these c o n n e c t i o n s . l t i s f i r s t n e c e s s a r yt h o u g h t h a t t h e y b e connected to the loop. This should be done through an O.OOI mF 6OOV paper capacitor in each lead' The lug nearer to the rear cover is the aerial on the lug strip mounted in the case end.

ANALYSIS AND VOLTAGE VALVE EQUIPMENT
Valve Function Valve No. Valve

V ol ts

Tvpe lT4 lR5 rT4 ls5 3V4 6V4 90 90 9O 20 87 91 91 91

R.F.Amplifier FrequencyConverter l . F . ' A m p l iife r A.V .C . Dem odula to r, and I s t Au d i o P ower A mp l i fi e r R e c t iife r

VI v2 V3 v4

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t C a t h o d e o L l 6 C . T . , -l 2 5 V R 24 from 47,000, 33,000 sel ecti ng al together.

V5 V6

adjustable Voltage across C23 to b e w i t h i n 1 . 5 - 8 . 4 v e l l s or 22,000 ohms one watt, or deleting

lhich are measured . These voltagesare measuredwith an l,0OO ohms per volt meter, except l55 plate and scten, are made belween the socket Measurements V.T.V,M., and may vary i lov" tio the iuoted ligures. with a oointi inaicatedlnd chassis. The receivershould be in a "no signal" condition'